我正在学习 Juju，我觉得它很棒，但是像往常一样遇到问题，而且很少有人能解释它是如何工作的。我希望你们中的任何人都可以指导我。
问题：部署图表仅适用于 LXD 控制器。在 microk8s 中不起作用。我能做些什么？为什么会这样？
列出控制器，有两个。一个 microk8s（已经随 Ubuntu 20.04 安装的那个）和
LXD Hypervisor for localhost (that I dont know perfectly what it is)
Controller Model User Access Cloud/Region Models Nodes HA Version
lxd-staging* lxd-staging-model admin superuser localhost/localhost 3 1 none 2.8.7
microk8s-staging microk8s-staging-model admin superuser microk8s/localhost 2 1 - 2.8.7
列出模型，每个控制器一个
administrator@master-ubuntu:~$ juju models -c lxd-staging
Controller: lxd-staging
Model Cloud/Region Type Status Machines Access Last connection
controller localhost/localhost lxd available 1 admin just now
default localhost/localhost lxd available 0 admin 3 minutes ago
lxd-staging-model* localhost/localhost lxd available 0 admin 31 seconds ago
administrator@master-ubuntu:~$ juju models -c microk8s-staging
Controller: microk8s-staging
Model Cloud/Region Type Status Access Last connection
controller microk8s/localhost kubernetes available admin just now
microk8s-staging-model* microk8s/localhost kubernetes available admin never connected
在 LXD 中部署，按预期工作。
administrator@master-ubuntu:~$ juju models
Controller: lxd-staging
Model Cloud/Region Type Status Machines Access Last connection
controller localhost/localhost lxd available 1 admin just now
default localhost/localhost lxd available 0 admin 10 minutes ago
lxd-staging-model* localhost/localhost lxd available 0 admin 8 minutes ago
administrator@master-ubuntu:~$ juju deploy mysql mysqldb
Located charm "cs:mysql-58".
Deploying charm "cs:mysql-58".
在 microk8s 中部署，错误。
administrator@master-ubuntu:~$ juju models
Controller: microk8s-staging
Model Cloud/Region Type Status Access Last connection
controller microk8s/localhost kubernetes available admin just now
microk8s-staging-model* microk8s/localhost kubernetes available admin never connected
administrator@master-ubuntu:~$ juju deploy mysql mysqldb
ERROR series "xenial" in a kubernetes model not valid